Quantum Mechanics Answers

Hypervelocity bullet used in 0.22 long rifle usually weigh around 2.1 g and can have a speed of 550 m/s. what must be the speed of a 75 kg man to match the momentum of this bullet?

The Hamiltanion due to interaction of particle of spin S with a magnetic field B is 

given by H=-S.B . Where S is the spin.Calculate the commutator [S,H]?

a charge Q of mass M is placed at distance D from infinite length of wire of lemda charge density .then its slightly displaced from equilibrium . its motion will be SHM or NOT.

In a nuclear reactions, the mass of the products was determined to be less considerable than the mass of the reactants. Explain 

A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls find cut off wavelength for dominant mode.

Obtain expression for escape velocity?

What if we define a 'RANDOM' mathematical set F in the beginning of universe whose cardinality remains constant with all parameters. the set represents five fundamental forces in universe,which remains same even if we discover a new force as we can directly right mathematical expressions of that new force in terms of any of those five fundamental force and there are only two long range forces in the set and other three are short range forces.Gravitational which is only attractive and Electromagnetic which is both attractive and repulsive so let's say we defined their mathematical expressions we found out the constants associated with them.We developed the concept of light from their.Then we used Hubble telescope to see the start of universe and we saw the different places in universe accelerating at different rate and we gave the argument that force due to dark energy is responsible for it but actually if we see in our set there is no such force so definitely if it is repulsive in nature there is only one such force which is repulsive.One at short range which is roughly the strength of gravitational force and acting between electrons and neutrons and other is a long range force which is nothing but the electromagnetic force.Through Hubble telescope we saw that repulsive force acts at long range so it implies that force has to be electromagnetic force.So from the thought experiment that I created is it proven that there is no dark energy and it is basically electromagnetic force and accept it or not when we talk about charge on a planet that is impossible to find out as we can never go to every galaxy or planet.So have I solved the biggest mystery of the universe through this thought experiment

Explain the energy for one dimensional harmonic oscillator.